Home / 28,186.80-42,241.32-21,253.68

Finding the Fourth Proportional to 28,186.80, 42,241.32 and 21,253.68

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Solution

The fourth proportional to 28,186.80, 42,241.32 and 21,253.68 is: 31,851.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,186.80 : 42,241.32 = 21,253.68 : x
  2. Step 2: Convert to fraction form
    28,186.80/42,241.32 = 21,253.68/x
  3. Step 3: Cross multiply
    28,186.80x = 42,241.32 × 21,253.68
  4. Step 4: Simplify right side
    28,186.80x = 897,783,498.06
  5. Step 5: Solve for x
    x = 897,783,498.06/28,186.80
  6. Step 6: Final answer
    x = 31,851.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.